We were shooting some drills today and I offered for guys to shoot my 16" mid-length back to back with their carbines. The constant response was "So that's what it's supposed to feel like!".
16" Mid-Length
Rifle buffer (A5H3)
15" rail
It has a 1" Battlecomp, but in my experience it didn't have any impact on this drill over a standard A2 FH.
I ended up having to just leave it with the group and get it back from them later. My "properly built AR disciples" keep growing in number.
